On behalf of the organizing committee, we would like to express our warmest welcome to all of you who are participating in APC 2021. The 11th Asian Photochemistry Conference (APC 2021) is going online conference on October 31(Sun.) - November 4(Thu.), 2021 for the health and safety of all participants.

We sincerely hope that all the participants have valuable time to have profound and useful discussions and also make long-lasting friendships with other participants and renowned researchers.

We thank you for your participation in advance and look forward to meeting you at APC 2021.